Elastic-fluid turbine-wheel.



PATENTED NOV. 10, 1903.

.1. J. HEDLUND. ELASTIC FLUID TURBINE WHEEL.

AIPLIOATION FILED APR. 30, 1903.

H0 MODEL INVENTOR fltmazvv MZu/AOL WTN ESSES UNITED STATES Iatented November 10, 1903.

PATENT OFFICE.

ELASTlC-FLUID TU RBlN E-WHEEL. 4

SPECIFICATION forming part of Letters Patent No. 743,869, dated November 10, 1903.

Application filed April 30, 1903.

To all whom it may concern.-

Be it known that I, PER J CHAN HEDLUND, of Stockholm, Sweden, have invented a new and usefullmprovementin Elastic-Fluid Turblue-Wheels, of which the following is a specification.

The invention relates to an elastic-fluid turbine-wheel and to an improved mode of securing the buckets therein.

In the accompanying drawings, Figure 1 shows a portion of the wheel periphery in cross-section on the line wzrof- Fig. 2. Fig. 2 is a section of the same on the line y'y of Fig. 1.

Similar letters of reference indicate like parts.

A and B represent the wheel-heads, which at the circumference of the wheel are inwardly inclined to form a contracted annular outlet-opening O. In each wheel-head and on the inner side are milled recesses the bottoms of which form straight'and relatively parallel walls. Said recesses are also inclined to radii of the wheel, as shown in Fig. 1. The

buckets D have their outer portions with pan 'allel longitudinal edges E to enter said recesses and their inner portions F curved. In order to secure said buckets in said recesses, screw-bolts Gare inserted at right angles to Serial No. 154,994. (No model.)

bine-wheel inwardly inclined at the periphcry to form a contracted annular outlet and having recesses on their inner sides provided with straight and relatively parallel walls, a bucket having its straight longitudinal edges inserted in saidrecesses and bolts in said wheel-heads passing transversely through said buckets.

In"testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

PER JOHAN HEDLUN D.

I Witnesses:

I. A. VAN WART, WM. H. SIEGMAN. 

